Packer slip socket



Juy 3E, i928. 1,678,829

T G. A. SCOTT ET AL,

PACKER SLIP SOCKET Filed June 29, 1927 M 7 l/ f/ 2.

' I `M lmmwd atented Jul/y 31, 1928.

UNITED STATES' PATENT oFFlcE.

I GLENN A. SCOTT A ND JAMES M. COCHRAN, OF VENTURA, CALIFORNIA.

PACKER SLIP SOCKET.

Application filed June 29, 1927, serial No. 202,242.

This inventlon relates to packer slip sockets, and is more particularlyrelated to a slip socket for use in packing oil casing and drill pipe inan oil Well or during the drilling of an o-il Well.

Slip sockets are used for the purpose of gripping casing or drill pipethat has been lost in the well. In the withdrawing of the casing ordrill pipe from the well or after the same has been gripped, it is oftendesired to pack olf the connection between the slip socket and thecasing or drill pipe which has beengripped, in order that the flushingliquid -ma be forced through the pipe carrying the sip socket andthrough the casing or' drill pipe which has been gripped, in order toaid in releasing the caslng or drill pipe from the well at the endthereof to brezk the hold on the pipe at the foot of the we It istherefore an object of this invention to provide a packer slip socketwhich is adapted to be secured to a pipe and lowered into the well togrip casing or drill pipe, and in which slip socket, means are providedfor packing off the connection between the pipe carrying the sli socketand the casing or drill pipe gripped? Another object of this inventionis to provide a packer slip socket including a body carryingin thecentral bore thereof a sleeve, within which gripping jaws or slips aremounted, and intermediate which sleeve and a shoulder formed in the bodythere is mounted a packing sleeve which is compressed outwardlyV whenthe casing or drill pipe is gripped by the load imparted through theslips onto one end of the packing sleeve. so that the packing sleeve isexpanded outwardly to make a fluid tight connection between the slipsocket and the well casing or drill pipe.

Another object of this invention is to provide a packer Slip socketwhich is adapted to be secured to a pipe and lowered into a well to gripa section of like pipe hung up or stuck in the well and provide a packedcoupling which may be left in the well.

Another object of this invention is to provide a means of gripping aparted casing` or drill stem, to be used in place of the commonly useddie nipple, and which will slip over the end of the parted casing andgrip the same so as to permit the continuation of the drilling operationwithout the necessity of rotating the casing or drill pipe to cutthreads on the 'parted section of pipe.

Other objects and advantages of this invention will be apparent from thefollowing detailed description of a preferred embodiment thereof, asillustrated in the accompanying drawings.

In the drawings Figure 1 is a side elevation of a slip socket embodyingthis invention, illustrating the same a'ssuspended within an oil well bya pipe and gripping a drill pipe or casing shown in section.

Figure 2 is a sectional side elevation of a packer slip socketembodying'this invention.

Figure 3 is an end sectional view taken substantially on the line 3 3 ofFig. 2.

In the preferred embodiment of this invention illustrated in theaccompanying drawings, 1 illustrates the outer casing of an oil wellwithin which acasing or drill pipe 2 has been inserted and lost. A.packer slip socket 3 embodying this invention is illustrated as securedto a pipe 4a and lowered into the well through the casing 1 to grip thecasing or drill pipe 2. p The packer slip socket 3 comprises a tubularbody 4, which has. formed at its upper end a tool joint 5, by means ofwhich the same is screw-threaded to a section of the pipe 4a, thethreads 6 being preferably rightha-nd threads. Screw-threaded at thelower end of the body 4 is a bell collar 7 which is open at its lowerend 8. The bell collar 7 is preferably tapered throughout its length toan edge, as illustrated at 9, so as to permit easy positioning of thecollar 7 over the casing or drill pipe which has been lost in the well.The bell collar 7 is internally screw-threaded to the body 4 andprovides a circumferential shoulder 10 at its upper end, upon which apacking sleeve 11 rests. The packing sleeve 11 may be of any desired orsuitable construction and may be constructed of any suitable materialsuch, for eX- .ample, as rubber canvas composition.

Slidably mounted within the body 4 above the packing sleeve 11 and inposition so that the same rests upon the upper edge 12 thereof, is atapered sleeve 13. The sleeve 13 is tapered outwardly from its lower toits upper end and mounted within the sleeve 13 are slips or grippingmembers erably\the edges of left-hand threads which are formed withinthe sleeve 13.

Means \are preferably provided for preventing the rotating of the sleeve13 and slips 14 within the body 4, s0 as'to enable the backingfofi' ofthe slips 14 from gripping the drill pipe 'for casingwhen it is foundimpossible..orimpractical to jar loose the drill. pipe orcasing.wlforthispurpose, keys 15 are provided'-which fit withinf slots16 formed through the sleeve 13 and into slots formed in the outerperiphery of the slips 14, and.A also fit Within'keyways or slots formedin the innerefsurfacel of the body 4, n order intoz-"r permit the easyassembly' of the packer slip socket, 'the keys 15 are preferably mountedbetween the edges of the two slips 14 so that the same may be easilyinserted in position from the end of the body 4. f

In operation,4 the packer slip socket is insertedinto `the well on thetubing 4 until` the bell collar -engagesand isv slipped over a drillpipejgofncasing. 'As the drill pipe or casing passesjthrough the slips14, the

slip socket is "raised by Vpulling upward'on the pipe 4a until the slips14 engage the drill pipe or casing. On lcontinuin'g the raising ofthe-slip socket so that there isv a load imposedi'pon' the slips14, the`slips 14 impart a pressure throughy the sleeve 13 onto the uppe'rfe'dgeyof the packing sleeve 13 to expand the? same outwardly against thedrill pipe or"jcasing and against ythe inner wall or surface of the body4 of the packer slip socket, thereby providing a fluid tight connectionbetween the drill pipe or casingy and the slip socket. p

Having fully described the` preferred embodiment of our invention, it islto be understoodthat we do not Wishl to be limited to the eXact detailsherein set forth, which may obviously be varied without departing fromthe spirit of our invention as set forth in the appended claims.

1. In a device of the class described, the combination of a tubular bodyhaving a circumferential shoulder 'at its upper end forming an abutment,a bell collar secured to the lower end thereof and providing acircumferential shoulder at its upper end, a packing sleeve mountedwithin the body and resting on the shoulder, a sleeve slidably mountedwithin the body in position to engage the upper edge of the packingsleeve and the shoulder at the upper end of the tubular body, and slipsmounted in the slidably mounted sleeve.

2. In' a device of the class described, the combination of a tubularbody having a lchamber therein with an inwardly extending annularshoulder at its upper extremity` a bell collar secured within the lowerend of the body providing a circumferential abutment at its upper edge,a packing sleeve mounted within the body and resting on said abutment, asleeve slidably mounted within the chamber of the body engaging theupper end of-the packing sleeve and confined between the sleeve and thesaid shoulder, and slips mounted in the slide ably mounted sleeve.

Signed at Ventura, California, this 16 day of June, 1927.

GLENN A. SCOTT. JAMES M. COCHRAN.

